No menu items!

Indicated probability

-

Indicated probability refers to the probability of a specified event occurring.

For example, suppose that two coins are tossed and we wish to find the probability of getting two heads. We have four possible outcomes {HH, HT, TH, TT} out of which possibility HH is the specified/indicated event. Here the indicated event has a one out of four chance of occurring and therefore,

Indicated probability = ¼ =0.25

So we see that the indicated probability can be calculated by the formula,

Formula to find indicated probability

Example 1: Suppose that dice is thrown. Find the probability of getting an even number.

Solution: Here the indicated event is getting an even number. The favourable outcomes are getting 2, 4, and 6 on the face of the dice.

There are a total of 6 outcomes of which 3 are favourable and hence by the above formula,

Indicated Probability = 3/6 = ½ = 0.5

The above example involved calculating dice roll probabilities.

Let us now consider an example of calculating coin toss probabilities.

Example 2: Suppose that two coins are tossed. Find the probability of getting exactly one head.

Solution: Here the indicated event is getting exactly one head. We have four possible outcomes {HH, HT, TH, TT}.

The favourable outcomes are {HT, TH}

There are a total of 4 outcomes of which 2 are favourable and hence by the above formula,

Indicated Probability = Number of favourable outcomes/Number of total outcomes = 2/4 = ½ = 0.5

Additional Rules to calculate indicated probabilities:

  1. Multiplication rule to calculate probability
  2. Addition rule to calculate P(A or B) that is, to calculate the probabilities of occurrence of either event A or event B

Hey 👋

I'm currently pursuing a Ph.D. in Maths. Prior to this, I completed my master's in Maths & bachelors in Statistics.

I created this website for explaining maths and statistics concepts in the simplest possible manner.

If you've found value from reading my content, feel free to support me in even the smallest way you can.



Share this article

Recent posts

Popular categories

Previous articleWhat is responding variable?
Next articleUndercoverage

Recent comments